Actor Adam Levine and director John Carney attend the premiere of "Begin Again" during the Tribeca Film Festival on Saturday, April 26, 2014, in New York.

Actor Adam Levine and director John Carney attend the premiere of "Begin Again" during the Tribeca Film Festival on Saturday, April 26, 2014, in New York.

Photo: Evan Agostini / Associated Press

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(L-R) Actors Hailee Steinfeld, Keira Knightley, director John Carney, and musician Adam Levine attend the "Begin Again" Closing Night Premiere during the 2014 Tribeca Film Festival at BMCC Tribeca PAC on April 26, 2014 in New York City. less

Musician Adam Levine (L) and model Behati Prinsloo attend the CHANEL Dinner in honor of the 2014 Tribeca Film Festival closing night film "Begin Again" at Tribeca Grill on April 26, 2014 in New York City.

Musician Adam Levine (L) and model Behati Prinsloo attend the CHANEL Dinner in honor of the 2014 Tribeca Film Festival closing night film "Begin Again" at Tribeca Grill on April 26, 2014 in New York City.

Photo: Bryan Bedder / Getty Images for CHANEL

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NEW YORK, NY - APRIL 26: Tribeca Film Festival Co-founder Robert De Niro and Grace Hightower attend the "Begin Again" Closing Night Premiere during the 2014 Tribeca Film Festival at BMCC Tribeca PAC on April 26, 2014 in New York City. less

NEW YORK, NY - APRIL 26: Tribeca Film Festival Co-founder Robert De Niro and Grace Hightower attend the "Begin Again" Closing Night Premiere during the 2014 Tribeca Film Festival at BMCC Tribeca PAC on April ... more

Keira Knightley has lavished praise on rocker Adam Levine for his film debut in their new romantic drama “Begin Again,” insisting the Maroon 5 frontman is a “natural” onscreen.

The stars play college sweethearts who relocate to New York to pursue music careers in the movie, which closed the Tribeca Film Festival on Saturday, and Knightley reveals she was blown away by Levine’s acting talents.

Calling singer a “natural entertainer,” she tells the Associated Press, “(Levine was) sensational in this film.”

But Knightley admits stepping out of her comfort zone to try her hand at singing in the movie filled her with dread: “I was completely terrified. I didn’t anticipate being as frightened as I was. I said yes to doing it and I was (like), ‘Oh, it’s gonna be fine, it’s gonna be fine,’ and then suddenly I found myself in a studio with real people who did it for a living and I was like, ‘I don’t know what I’m doing. I’m pretending.'”